2004-02-25  Sven Neumann  <sven@gimp.org>

	* app/tools/gimpcurvestool.[ch]
	* app/tools/gimpimagemapoptions.[ch]
	* app/tools/gimpimagemaptool.[ch]
	* app/tools/gimplevelstool.[ch]: moved the settings file dialog
	that was duplicated in the curves and levels tools to the
	GimpImageMapTool class. Store the last used filename in the
	GimpImageMapOptions (proper fix for bug #135059).